Double-acting force-pump.



PATENTBD MAR. 29,1904.

E. J. HANNAH. DOUBLE AGTING FORGE PUMP.

APPLICATION FILED JULY 19, 1902.'

N0 MODEL.

IIIIIIIIIHH lIllllllllnmrlrwilllillllllln Ilm "mun Patented March 29, 1904.

PATENT OFFICE.

EDGAR J. HANNAH, OF GREENCASTLE, MISSOURI.

DOUBLE-ACTING FORGE-PUMP.

SPECIFICATION forming part of Letters Patent No. 756,113, dated March 29, 1904.

Application filed July 19, 1902. Serial No. 116,184. (No model.)

T0 all whom tw/way concern:

Be it known that I, EDGAR J. -HANNAH, a citizen of the United States, residing at Greencastle, in the county of Sullivan and State of Missouri, have invented anew and useful Double-Acting Force-Pump, of which the following is a speciication.

This invention is an improved construction With these objects in view my invention consists, essentially, in the employment of a cylinder or barrel having suction and dis- -charge pipes connected thereto, a piston working in the cylinder or barrel', valves and their seats arranged at the ends of the cylinder or barrel, and the tubes connected to the piston at each end and extending in opposite directions, each tube being provided with a valve and each tube also passing through one of the valves and the seat at the end of the cylinder, the piston being divided by a partition or diaphragm, so that water is passing therethrough during the downstroke, being dischargedv from -bottom of cylinder and filling top of cylinder.

The invention consists also in the novel construction of the piston, in the construction of the valve and seat, and still further in certain novelties of construction and combination, all of which will be Jfully described hereinafter and pointed out in the claims.

In the drawings forming a part of this specirication, Figure 1 is a vertical sectional view of a pump constructed in accordance with my invention. Fig. 2 is an enlarged sectional view, partly in elevation, and illustrating the valves arranged at the upper end of the tube. Fig. 3 is a detail perspective view of the piston. Fig. i is an enlarged sectional view taken through the lower end of the cylinder or barrel and illustrating the ring-valve and its sea-t at the said lower end. Fig. 5 is a horizontal sectional view on the line 5 5 of Fig. 6. Fig. 6 is an enlarged vertical sectional view of the piston. Fig. 7 is a horizontal sectional view taken on the line 7 7 of Fig. 6 and looking upwardly.

In constructing a pump in accordance with my invention I employ a cylinder or barrel A, which may be of any size desired and which has a suction-pipe C connected thereto at the lower end by means of an elongated tubular head B, and the discharge-pipe D is connected to the upper end of the cylinder or barrel by means of a similarly-shaped head B also, said head being connected to the ends of the cylinder by means of screw-joints. In practice I prefer to make the upper head longer than the lower one; but such construction is not absolutely essential. A hollow cylindrical piston E is arranged within the cylinder or barrel A, said piston being subdivided into two compartments or passages by means of an oblique partition or diaphragm E. This partition E terminates in the threaded collar E2 at the upper end of the piston and threaded collar E3 at the lower end of the piston. At the upper end of the piston is a curved opening Ei, arranged at one side of the threaded collar E2, and at the opposite side of the collar the end of the piston is closed, as shown at E5, and at vthe lower end a similar-shaped opening E5 and 'closed portion E7 are produced, only their positions are reversed, and it will be noted that each end of the piston is constructed alike, so that in placing the| piston in the cylinder either end can be arranged uppermost.

A tube F is screwed into the collar E2 at the upper endV of the piston, and a tube Gr is screwed into the collar E3 at the lower end of the piston. Packing-rings H of any suitable construction may be arranged upon the eXterior of the piston E, if so desired, and held in place by means of threaded rings H; but this packing isnot essential.

A valve I is arranged in the lower tube G, preferably at the upper end thereof, and is adapted to open upwardly upon the Adownstroke of the piston, said valve having a stem 100 I, working in a guide I2, arranged in the tube G. An upwardly opening valve K is arranged upon the seat K, arranged in the tube F, preferably at the upper end, said valve having depending guides K2, which work through the transverse guides K3, carried by the tube F. This valve K works within a cage L, attached to and extending over the upper end of the tube F, said cage serving also as a means for connecting the sucker-rod M to the working parts of the pump.

Rings N are secured within the cylinder A, adjacent the opposite ends, said rings being of such size that the upper and lower tube can work freely up and down. In fact, the central opening of each ring is considerably greater than the exteriordiameter of the tube, so that a free annular space is left between each ring and the tube working therethrough. These rings N form the seats for the ringvalves O, which surround the tubes F and G, working' freely thereon and the tubes working freely therethrough. The valves are held in place and are limited in their upward movements by means of the annular stop-pins P, which are connected to the ring-seats N and are preferably formed integral therewith. Each valve O may be provided with a guiding-ring O, which may be adjustably secured thereto or integral therewith and which is intended to guide the movement of the valve upon the tubes and also serve to guide the movement of the tubes through the Valves. There is a small annular space between the valve and end of ring O', thereby providing a water packing between the valve and tube.

By means of a pump constructed as herein shown and described I am able to maintain a continuous flow of water from the pump, and inasmuch as the said pump operates upon both the up and down stroke of the piston it is obvious that a continuous suction and continuous discharge will be had. Upon the downstroke of the piston the lower valve O will be closed, the valve I at the upper end of the tube G will open, and water will pass upwardly through the piston into the upper head of cylinder. At the same time the water contained within the cylinder above the lower valve O is forced upwardly through the opposite side of the piston, out through the upper tube F, and through the valve K into the upper head. and discharge-pipe. Upon the upstroke of the piston the valves O are open and the valves I and K are closed. All the water in the cylinder above the piston will be forced out through the upper valve O into the upper head and discharge-pipe, inasmuch as the valve I is closed, and water will be taken into bottom of cylinder from suctionpipe, inasmuch as valve K is closed. It will thus be seen that there is a continuous and equal discharge of water at each and every stroke of the piston, and by delivering the water without any circumlocution all back pressure is avoided. By means of the peculiar construction and arrangement of the ringvalves and their seats with reference to the upper and lower tubes I am enabled to draw a maximum amount of water through a given diameter of cylinder, thereby specially adapting this construction of pump to deep-drilled wells.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a pump of the kind described, the cornbination with the suction and discharge pipes, of the cylinder and head for connecting the same to said pipes, the hollow piston arranged in the cylinder, said piston being divided by a partition, which terminates in a threaded collar at each end, the upper and lower ends of the piston having reversely-arranged open and closed portions, the tubes fitting in the threaded collars, each tube having a valve arranged therein, a ring-valve arranged upon each tube, a seat for each ring-valve, said seats being arranged in the cylinder, adjacent the opposite ends, stop-pins carried by the seats, for limiting the upward movements of the ring-valves, the openings in the ring-seats being greater than the exterior diameter of the tubes which work therethrough, whereby water will pass freely around the tubes, through the seats and pass the ring-valve.

2. In a pump of the kind described, a reversible hollow piston, having a dividing-pal'- tition terminating in a threaded collar at each end, each end of the piston having a curved opening on one side of the collar, the opposite side of the piston end being closed, said open and closed portions being reversely arranged at the opposite ends, substantially as described.

3. In a pump of the character described employing a single cylinder and having end castings, the combination therewith of means located within the said cylinder and end castings adapted in operation to force substantially a continuous ow, the said means consisting of fixed valve-seats at the ends of the cylinder, valves in said seats, a plunger constructed with upper and lower openings forming separate passage-ways therethrough a tube leading from the said upper opening in the plunger, extended loosely, but water-tight, through the said upper valve, a similar tube leading from the lower opening in the plunger and extended loosely, but water-tight, through the said lower valve, a valve supported by and closing the upper end of the lower tube and a valve closing the upper end of the upper tube, substantially as described.

4. rIhe combination in a pump of the character described, a single cylinder, castings secured to the upper and lower ends of the cylinder, valve-seats at both ends of t-he cylinder held in place between the ends thereof, and the inner shoulders on the end castings, ver- IOO IIO

IIS

tically-moving Valves on the said fixed seats, each having an opening therethrough, a plunger within the said cylinder with means to work it and having upper and lower connected l tubes, one tube being extended and working freely through the opening in the valve at the upper end of the cylinder, and the other tube extended down and working freely through the opening in the valve at the lower end of the cylinder, one of the said tubes being adapted to form a closed passage to the cylinder above the plunger from below the lower fixed valveseat, and the other tube being adapted to form a closed passage from the cylinder below vthe 'plunger to the end casting and above the upper xed valve-seat, a valve supported by and closing the upper end of the said lower tube, and a valve closing the upper end of the said upper tube, substantially as described.

5.' In a pump of the character described, the combination withv a single cylinder having castings on the ends thereof, valves closing the upper and lower ends of the cylinder, a plunger within the cylinder having separate passage-ways through it, upper and lower tubes fixed to and moving with the plunger, adapted to form closed passage-ways from both sides thereofl to and beyond the said upper and lower valves closing the cylinder ends, and valves supported by and closing the upper ends of both the said tubes, substantially as described.

6. The combination in a pump of the char-,

EDGAR J. HANNAH.

Witnesses:

JNO. VV. BINGHAM, EDWARD H. FLETCHER. 

